A social gathering of people wearing disguises or costumes, and amusing themselves with dancing, conversation, or other diversions.

plural of costume party

plural of rainbow party

plural of green party

Alternative form of multiparty

Coloured with different tints; variegated.

A pre-planned party in which participants secretively gather in a certain location, wait for the arrival of the person they wish to honour and, traditionally, greet the arrival of the honoured person by shouting, "Surprise!".

(UK politics) A centre-right political party, official full name Conservative and Unionist Party, informally known as the Tory Party. / (Canadian politics) Clipping of Progressive Conservative Party.

plural of third party

(politics) Within a legislative body, a member appointed by a political party and given the authority to ensure that all members of that party participate in voting and vote strictly as directed by the party in all votes where adherence to a party line is required.